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| H | Flamengo RJ | - | Boca Juniors | 2:1 (0:0) | ||
| R | Boca Juniors | - | Flamengo RJ | 3:0 (2:0) | ||
| H: 01.05.1991 | R: 08.05.1991 | Sieger: Boca Juniors | ||||
| H | Cerro Porteño | - | Club Olimpia | 1:0 (0:0) | ||
| R | Club Olimpia | - | Cerro Porteño | 3:0 (1:0) | ||
| H: 02.05.1991 | R: 08.05.1991 | Sieger: Club Olimpia | ||||
| H | Colo-Colo | - | Nacional | 4:0 (2:0) | ||
| R | Nacional | - | Colo-Colo | 2:0 (1:0) | ||
| H: 03.05.1991 | R: 08.05.1991 | Sieger: Colo-Colo | ||||
| H | América de Cali | - | Atlético Nacional | 0:0 (0:0) | ||
| R | Atlético Nacional | - | América de Cali | 2:0 (2:0) | ||
| H: 03.05.1991 | R: 10.05.1991 | Sieger: Atlético Nacional | ||||
